{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T21:02:57Z","timestamp":1777755777484,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2009,2,24]],"date-time":"2009-02-24T00:00:00Z","timestamp":1235433600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2009,2,24]],"date-time":"2009-02-24T00:00:00Z","timestamp":1235433600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta Haematol"],"abstract":"<jats:p>A new in vitro colony growth assay system method was found to be reliable in its use for evaluating B-cell proliferation in normal subjects and in 9 patients with B-cell chronic lymphocytic leukemia (B-CLL). The method is based on a phytohemagglutinin (PHA)-stimulated monocyte and T-cell-conditioned medium (PHA-MTCM) composed of PHA, silica, normal monocytes and normal T cells. The number of colonies proliferated was significantly greater in 5 patients who had not undergone treatment than in normal subjects (1,417 \u00b1 660 vs. 661 \u00b1 119) (p &lt; 0.002). Normal cultured B-cell colonies were shown to be 71% surface IgM colonies, and 6% cytoplasmic IgA colonies with the appearance of blastic cells. B-CLL colonies, on the other hand, were demonstrated to be monoclonal with the same CLL circulating cells being retained. We also studied the effect of interleukin-2 (IL-2) on B-cell colony growth assay in 4 patients with B-CLL cells. Only 1 patient with M protein responded to IL-2, proliferated and expressed IL-2 receptors. Although 3 patients without M protein did not respond to IL-2, they did respond to the supernatant, and they proliferated but expressed no IL-2 receptors.<\/jats:p>","DOI":"10.1159\/000205391","type":"journal-article","created":{"date-parts":[[2009,2,24]],"date-time":"2009-02-24T13:05:14Z","timestamp":1235480714000},"page":"10-14","source":"Crossref","is-referenced-by-count":0,"title":["Colony-Stimulating Factors in B-Cell Colony Formation in Patients with B-Cell Chronic Lymphocytic Leukemia"],"prefix":"10.1159","author":[{"given":"Taijiro","family":"Ishiyama","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sotaro","family":"Abe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshihisa","family":"Wakabayashi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shunichi","family":"Hirose","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2009,2,24]]},"container-title":["Acta Haematologica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/205391","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000205391","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T12:12:45Z","timestamp":1777464765000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000205391"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,2,24]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000205391","archive":["Portico"],"relation":{},"ISSN":["0001-5792","1421-9662"],"issn-type":[{"value":"0001-5792","type":"print"},{"value":"1421-9662","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,2,24]]}}}